* use our memory barriers instead of ptmalloc2's, since it only does the

right thing with gcc on x86.

This commit was SVN r8490.

opal/mca/memory/ptmalloc2/arena.c

@@ -739,7 +739,10 @@ arena_get2(a_tsd, size) mstate a_tsd; size_t size;
   /* Add the new arena to the global list.  */
   (void)mutex_lock(&list_lock);
   a->next = main_arena.next;
+/* OMPI: use our barriers 
   atomic_write_barrier ();
+*/
+  opal_atomic_wmb();
   main_arena.next = a;
   (void)mutex_unlock(&list_lock);
 

opal/mca/memory/ptmalloc2/malloc.c

@@ -5,6 +5,7 @@
 #include <unistd.h>
 #include <sys/mman.h>
 
+#include "opal/include/sys/atomic.h"
 #include "opal/memoryhooks/memory_internal.h"
 
 /*